!default_rounded_amount ||= 5px

// Round corner at position by amount.
// values for position: "top-left", "top-right", "bottom-left", "bottom-right"
=round-corner(!position, !amount = !default_rounded_amount)
  @if !position == "top-left"
    -moz-border-radius-topleft= !amount
  @if !position == "top-right"
    -moz-border-radius-topright= !amount
  @if !position == "bottom-left"
    -moz-border-radius-bottomleft= !amount
  @if !position == "bottom-right"
    -moz-border-radius-bottomright= !amount
  -webkit-border-#{!position}-radius= !amount
  border-#{!position}-radius= !amount

// Round left corners by amount
=round-left-corners(!amount = !default_rounded_amount)
  +round-corner("top-left", !amount)
  +round-corner("bottom-left", !amount)

// Round right corners by amount
=round-right-corners(!amount = !default_rounded_amount)
  +round-corner("top-right", !amount)
  +round-corner("bottom-right", !amount)

// Round top corners by amount
=round-top-corners(!amount = !default_rounded_amount)
  +round-corner("top-left", !amount)
  +round-corner("top-right", !amount)

// Round bottom corners by amount
=round-bottom-corners(!amount = !default_rounded_amount)
  +round-corner("bottom-left", !amount)
  +round-corner("bottom-right", !amount)

// Round all corners by amount
=round-corners(!amount = !default_rounded_amount)
  -moz-border-radius= !amount
  -webkit-border-radius= !amount
  border-radius= !amount